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AS 1222.1 GSW Galvanized Steel Cable Conductor SC/GZ Messenger Wire
DOWNLOAD CATEGORY SPECIFICATIONS
Application
Galvanized steel conductor SC/GZ are galvanized steel wire strands that are mainly used for sustaining mechanical load in the electricity industry.
Characteristics
The galvanized guy wire is made from fully-killed steel with a carbon content of 0.6% has a UTS of 1.31-1.39GPa.It is galvanized by either a hot dip or electrolytic process to give a zinc coating mass of 200-260g/m2 specified in AS 1222.1 standard.
Packing
Delivery lengths are determined from a consideration of such factors as physical drum dimensions, drum weights, span length and handling equipment.
Construction
Galvanized steel wires are stranded concentrically with successive layers having an opposite direction of lay, the outermost layer being right-handed.
When required, a larger central wire (king wire) is included in a conductor. The diameter of this wire is based on conductor design considerations and is usually 5% greater than the surrounding wires.
Specifications
- AS 1222.1 Standard galvanized steel guy wire
AS/NZS 1222.1 Standard Bare Steel Conductor SC/GZ Physical,Mechanical and Electrical Performance Parameters
|
No./Dia.of Stranding Wires |
Nominal Overall Diameter |
Cross Section Area |
Nominal Linear Mass
|
Breaking Load |
Modulus of Elasticity |
Coefficient of Linear Expansion |
D.C.Resistance |
Continuous current carrying capacity |
||||||
|
at 20°C |
at 75°C |
at night in winter |
at noon in summer |
|||||||||||
|
still air |
1s/m wind |
2s/m wind |
still air |
1s/m wind |
2s/m wind |
|||||||||
|
No./mm |
mm |
mm2 |
kg/km |
kN |
GPa |
x 10–6/°C |
Ω/km |
Ω/km |
A |
A |
A |
A |
A |
A |
|
3/2.00 |
4.3 |
9.43 |
74 |
11.7 |
189 |
11.5 |
20 |
25 |
21 |
37 |
43 |
17 |
34 |
40 |
|
3/2.75 |
5.9 |
17.8 |
140 |
22.2 |
189 |
11.5 |
11 |
14 |
31 |
54 |
63 |
25 |
49 |
58 |
|
7/2.00 |
6.0 |
22.0 |
173 |
26.0 |
187 |
11.5 |
8.7 |
11 |
35 |
61 |
71 |
28 |
55 |
66 |
|
7/2.75 |
8.3 |
41.6 |
328 |
49.0 |
187 |
11.5 |
4.6 |
5.7 |
54 |
91 |
106 |
41 |
82 |
97 |
|
7/3.25 |
9.8 |
58.1 |
458 |
68.7 |
187 |
11.5 |
3.3 |
4.1 |
67 |
113 |
131 |
51 |
100 |
119 |
|
7/3.75 |
11.3 |
77.3 |
609 |
91.3 |
187 |
11.5 |
2.5 |
3.1 |
81 |
134 |
156 |
60 |
119 |
141 |
|
19/2.00 |
10.0 |
59.7 |
473 |
70.5 |
184 |
11.5 |
3.2 |
4.0 |
69 |
115 |
134 |
52 |
102 |
121 |
|
19/2.75 |
13.8 |
113 |
894 |
133 |
184 |
11.5 |
1.7 |
2.1 |
105 |
171 |
199 |
76 |
150 |
179 |
|
19/3.25 |
16.3 |
158 |
1250 |
186 |
184 |
11.5 |
1.2 |
1.5 |
133 |
213 |
247 |
94 |
186 |
221 |
Note
The electrical performance characteristics shown above do not take magnetic effects into consideration and are therefore only approximate.
Current ratings are based on the following conditions:
• Conductor temperature rise above ambient of 40°C
• Ambient air temp. of 35°C for summer noon or 10°C for winter night
• Direct solar radiation intensity of 1000 W/m2 for summer noon or zero for winter night
• Diffuse solar radiation intensity of 100 W/m2 for summer noon or zero for winter night • Ground reflectance of 0.2
• Emissivity and solar absorption coefficient of the conductor surface, 0.5
